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SUMMARY:Interferometric measurements of the 21-cm signal with SKA - Yuchen
  Liu and Oscar O'Hara (Cavendish Astrophysics)
DTSTART:20240507T101500Z
DTEND:20240507T110000Z
UID:TALK215866@talks.cam.ac.uk
CONTACT:Charles Walker
DESCRIPTION:The Cosmic Dawn marks the first star formations and preceded t
 he Epoch-of-Reionization\, when the Universe underwent a fundamental trans
 formation propelled by the radiation from these first stars and galaxies. 
 Interferometric 21-cm experiments aim to probe redshifted neutral hydrogen
  signals from these periods\, constraining the conditions of the early Uni
 verse. The SKA -LOW instrument of the Square Kilometre Array telescope is 
 envisaged to be the largest and most sensitive radio telescope at m and cm
  wavelengths. In this talk we present a full SKA pipeline that consist of 
 forward modelling and data analysis that were also tested in the SKA Scien
 ce Data Challenge 3a: Epoch of Reionisation (SKA SDC3a) to process the nov
 el data products expected from the SKA. The forward modelling enables simu
 lation of the astrophysical signals from the Epoch of Reionization and cho
 sen systematic effects of the SKA-LOW. In the analysis part we implement p
 redictive foreground and Bayesian Gaussian Process Regression models along
 side a foreground avoidance strategy to isolate the 21-cm signal from that
  of the astrophysical radio frequency (RF) foregrounds. Together these wil
 l determine whether a successful 21-cm detection is possible with the envi
 saged SKA.
LOCATION:Coffee area\, Battcock Centre
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